<?php

/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * http://www.gnu.org/copyleft/gpl.html
 */
 


/**
 *  @file
 *  @Author Samuel Maura
 */
class EncryptString{

  const SALT_LEN = 12;
  
  function generateEncryptedString($val,$salt = null){
    if ($salt === null){
      $salt = substr(sha1(uniqid(mt_rand(), true)), 0, self::SALT_LEN);
    }
    return $salt.sha1($salt.$val);
  }
  
  function getSaltFromEncryptedString($val){
    return substr($val,0,self::SALT_LEN);
  }
  

}


?>